Fleetguard LF14000NN Oil Filter for Cummins QST30 & ISX15 — 1-Pack, Drop-In Replacement

Fleetguard LF14000NN is a direct-replacement lube oil filter (1-pack) designed as the upgraded successor to LF9080 for Cummins QST30 and ISX15 engines.

This LF14000NN oil filter from Fleetguard replaces LF9080 and is intended for use on Cummins QST30 and Cummins ISX15 engines. Engineered for heavy-duty applications, it cross-references DBL7900, P559000, and BD50000, making it compatible with several existing service parts lists. The single-pack configuration provides a straightforward swap when performing routine maintenance or following scheduled service intervals.

How does the LF14000NN improve on the LF9080?

The LF14000NN is presented by Fleetguard as an updated part number that maintains the service characteristics of LF9080 while aligning with current manufacturing and quality standards. It preserves fit, form, and function for the engine models listed so technicians can use it as a like-for-like replacement without modification.

• Updated part number to reflect Fleetguard product line modernization
• Same mounting dimensions and sealing interface for drop-in replacement
• Maintains filtration performance suitable for heavy-duty diesel lubrication systems
• Cross-referenced to DBL7900, P559000, BD50000 for parts compatibility

Will this filter fit my Cummins QST30 or ISX15 engine?

Yes — LF14000NN is specified to fit Cummins QST30 engines and Cummins ISX15 engines. Always confirm compatibility using your engine serial number or OEM parts manual before purchase to ensure the correct filter for your application.

• Factory fitment: Cummins QST30
• Factory fitment: Cummins ISX15
• Cross-check with engine serial and OEM parts lists for final confirmation
• Matches physical dimensions and thread/seal specifications of LF9080

What should technicians expect when installing this Fleetguard oil filter?

Installation is the same as other spin-on lube filters: drain or relieve pressure following the engine manufacturer’s service procedures, remove the old unit, inspect sealing surfaces, and install the new LF14000NN hand-tight plus recommended torque if specified. Use proper disposal methods for used oil and filters.

• Follow Cummins service bulletin or manual for safe oil-drain procedures
• Inspect mounting face and replace gaskets if worn
• Install new filter until gasket contacts, then tighten per spec or hand-tighten plus 3/4 turn
• Check for leaks and verify oil pressure after start-up

What service parts does LF14000NN cross-reference?

The LF14000NN lists common cross-references to assist ordering and parts interchangeability. These references help fleets and parts managers replace older stock or identify alternative listings in third-party catalogs.

• DBL7900 — common aftermarket/legacy number
• P559000 — alternative catalog reference
• BD50000 — additional cross-reference used by some suppliers
• Also recognizes LF9080 as the part it replaces

Who is this for?

This Fleetguard LF14000NN oil filter (1-pack) is intended for diesel mechanics, fleet maintenance managers, and owners/operators of heavy-duty vehicles powered by Cummins QST30 or ISX15 engines. It suits anyone looking to replace the older LF9080 with a current Fleetguard part number that aligns with existing service and parts catalogs. Ideal for commercial truck fleets, heavy-equipment shops, and on-road/off-road service garages that require a reliable, OEM-compatible lube filter and need clear cross-reference information for inventory and procurement.